1. Mp3 playback - Not planning to have a separate HU (is this okay?)
Its easier to have one since you can tap in to you AUX INPUT, but its not necessary!!
3. GPS navigation
iGuidance FTW (For The Win) Easiest software, light on memory....simply one of the best
4. Internet Capability
3 options possible:
1-With you phone
2-Satellite USB/PCMCIA with a ~60$/month plan
3-Free Wifi, (you need an access point)
5. Back-up camera w/ night vision
Plenty of thread on the subject, depends on the size and needs. As for connecting the camera, the touch screen already have an RCA VIDEO INPUT, you simply connect your video input and tap into the backup light wiring....You need to configure your screen in a way that it will switch to VIDEOInput when there's a signal, that way you'll get you backup camera working everytime your in reverse
6. Bluetooth Capability to integrate my smart phone
Good luck with that one, I see here that a lot of people are strugling with that option!!
7. OBD II connection
It depends on your car model and year...if you only need to read the info its should be pretty simple, you simply need to integrate everything with the skin you'll choose
8. Separate Mp3 CD changer possible?
Better get a Head Unit for that
9. I-Pod hook up
If you get a USB Head unit you can plug it in easily and even see whats playing on your display
10. Mini USB kerboard/mouse (wireless?)
Go ahead for WIRELESS dont make the same mistake I made !!
Assumed: The Screen will be a touch screen. FOR SURE!!
What OS would best accommodate my needs?
Windows XP striped to the bones and adjust for best performance...
In my opinion, you should take more time to plan you project before going for the install...make sure to test everything in your house before .....The more you search and test the more you'll be happy when the install is done!!
WELCOME ON MP3Car AND GOOD LUCK BRO!!